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Name:PDC two-stair rib coring drill bits

Type:Ordinary Strengthened High strength

Feature:Arrange teeth in stages when the crown part space is enough, it has another geometric construction of ordinary rib drill bits, thus to increase area between blade and lamellar body, reduce pressure on blade unit area, prolong service life of the blades, improve gauge protection effect and protect core tube. The water gap is deepened, and it is suitable for drilling for large well depth and high pump pressure.